---
title: array
description: Creates an array schema.
source: /schemas/array/array.ts
contributors:
  - fabian-hiller
  - kazizi55
---

import { ApiList, Link, Property } from '~/components';
import { properties } from './properties';

# array

Creates an array schema.

```ts
const Schema = v.array<TItem, TMessage>(item, message);
```

## Generics

- `TItem` <Property {...properties.TItem} />
- `TMessage` <Property {...properties.TMessage} />

## Parameters

- `item` <Property {...properties.item} />
- `message` <Property {...properties.message} />

### Explanation

With `array` you can validate the data type of the input. If the input is not an array, you can use `message` to customize the error message.

> If your array has a fixed length, consider using <Link href="../tuple/">`tuple`</Link> for a more precise typing.

## Returns

- `Schema` <Property {...properties.Schema} />

## Examples

The following examples show how `array` can be used.

### String array schema

Schema to validate an array of strings.

```ts
const StringArraySchema = v.array(v.string(), 'An array is required.');
```

### Object array schema

Schema to validate an array of objects.

```ts
const ObjectArraySchema = v.array(v.object({ key: v.string() }));
```

### Validate length

Schema that validates the length of an array.

```ts
const ArrayLengthSchema = v.pipe(
  v.array(v.number()),
  v.minLength(1),
  v.maxLength(3)
);
```

### Validate content

Schema that validates the content of an array.

```ts
const ArrayContentSchema = v.pipe(
  v.array(v.string()),
  v.includes('foo'),
  v.excludes('bar')
);
```

## Related

The following APIs can be combined with `array`.

### Schemas

<ApiList
  items={[
    'any',
    'bigint',
    'blob',
    'boolean',
    'custom',
    'date',
    'enum',
    'exactOptional',
    'file',
    'function',
    'instance',
    'intersect',
    'lazy',
    'literal',
    'looseObject',
    'looseTuple',
    'map',
    'nan',
    'never',
    'nonNullable',
    'nonNullish',
    'nonOptional',
    'null',
    'nullable',
    'nullish',
    'number',
    'object',
    'objectWithRest',
    'optional',
    'picklist',
    'promise',
    'record',
    'set',
    'strictObject',
    'strictTuple',
    'string',
    'symbol',
    'tuple',
    'tupleWithRest',
    'undefined',
    'undefinedable',
    'union',
    'unknown',
    'variant',
    'void',
  ]}
/>

### Methods

<ApiList
  items={[
    'assert',
    'config',
    'fallback',
    'getDefault',
    'getDefaults',
    'getFallback',
    'getFallbacks',
    'is',
    'message',
    'parse',
    'parser',
    'pipe',
    'safeParse',
    'safeParser',
  ]}
/>

### Actions

<ApiList
  items={[
    'check',
    'checkItems',
    'brand',
    'description',
    'empty',
    'everyItem',
    'excludes',
    'filterItems',
    'findItem',
    'flavor',
    'includes',
    'length',
    'mapItems',
    'maxLength',
    'metadata',
    'minLength',
    'nonEmpty',
    'notLength',
    'partialCheck',
    'rawCheck',
    'rawTransform',
    'readonly',
    'reduceItems',
    'someItem',
    'sortItems',
    'title',
    'transform',
  ]}
/>

### Utils

<ApiList items={['entriesFromList', 'isOfKind', 'isOfType']} />
